diff --git a/pm3py/hw.py b/pm3py/hw.py
index 5d6952a..519554b 100644
--- a/pm3py/hw.py
+++ b/pm3py/hw.py
@@ -40,16 +40,81 @@ class HWCommands:
         resp = await self._t.send_ng(Cmd.STATUS, payload, timeout=2.0 + speed_test_timeout / 1000)
         return {"status": resp.status}
 
-    async def led(self, led: int, action: str = "on", brightness: int = 100,
-                  speed: int = 500, count: int = 5) -> dict:
-        """Control LEDs. led: bitmask (1=A,2=B,4=C,8=D). action: on/off/toggle/pwm/pulse/fade/blink."""
-        actions = {"off": 0, "on": 1, "toggle": 2, "pwm": 3, "pulse": 4, "fade": 5, "blink": 6}
-        if action not in actions:
-            raise ValueError(f"Unknown action: {action}. Use one of: {list(actions.keys())}")
-        payload = struct.pack("<BBBHH", led, actions[action], brightness, speed, count)
+    async def led(self, led: str | int = "all", *,
+                  on: bool = False, off: bool = False, toggle: bool = False,
+                  brightness: int = -1, pulse: bool = False, fade: bool = False,
+                  blink: bool = False, speed: int = 500, count: int = 5) -> dict:
+        """Control LEDs on the Proxmark3.
+
+        Args:
+            led: Color name(s), letter(s), or bitmask int.
+                 Names: "green", "red", "orange", "blue", "all"
+                 Letters: "a", "b", "c", "d"
+                 Comma-separated: "green,red"
+                 Bitmask: 1=A, 2=B, 4=C, 8=D
+
+            Action kwargs (pick one):
+                on: Turn LED on
+                off: Turn LED off
+                toggle: Toggle LED state
+                brightness: Set PWM brightness 0-100 (PWM LEDs only)
+                pulse: Pulse effect (PWM LEDs only)
+                fade: Fade effect (PWM LEDs only)
+                blink: Blink effect (all LEDs)
+
+            Effect params:
+                speed: Cycle time in ms (default 500)
+                count: Repeat count, 0=infinite (default 5)
+        """
+        # Resolve LED mask
+        if isinstance(led, int):
+            led_mask = led & 0x0F
+        else:
+            led_mask = self._parse_led_str(led)
+
+        # Resolve action
+        if brightness >= 0:
+            action_code = 3
+            brightness_val = min(max(brightness, 0), 100)
+        elif off:
+            action_code = 0
+            brightness_val = 0
+        elif toggle:
+            action_code = 2
+            brightness_val = 0
+        elif pulse:
+            action_code = 4
+            brightness_val = 0
+        elif fade:
+            action_code = 5
+            brightness_val = 0
+        elif blink:
+            action_code = 6
+            brightness_val = 0
+        elif on or True:  # default to "on"
+            action_code = 1
+            brightness_val = 0
+
+        payload = struct.pack("<BBBHH", led_mask, action_code, brightness_val, speed, count)
         resp = await self._t.send_ng(Cmd.LED_CONTROL, payload)
         return {"status": resp.status}
 
+    @staticmethod
+    def _parse_led_str(led: str) -> int:
+        """Parse LED string into bitmask. Accepts names, letters, or 'all'."""
+        LED_MAP = {
+            "a": 0x01, "b": 0x02, "c": 0x04, "d": 0x08,
+            "green": 0x02, "orange": 0x01, "red": 0x04, "blue": 0x08,
+            "all": 0x0F,
+        }
+        mask = 0
+        for token in led.lower().replace(" ", "").split(","):
+            if token in LED_MAP:
+                mask |= LED_MAP[token]
+            else:
+                raise ValueError(f"Unknown LED: {token!r}. Use: {', '.join(LED_MAP.keys())}")
+        return mask
+
     async def dbg(self, level: int | None = None) -> dict:
         """Get or set debug level. None=get, 0-4=set."""
         if level is None:
diff --git a/tests/test_hw.py b/tests/test_hw.py
index 3220dfc..e14f571 100644
--- a/tests/test_hw.py
+++ b/tests/test_hw.py
@@ -39,9 +39,36 @@ def test_status():
     result = asyncio.get_event_loop().run_until_complete(hw.status())
     assert result["status"] == 0
 
-def test_led():
+def test_led_on_by_name():
     transport = make_mock_transport()
     hw = HWCommands(transport)
     transport.send_ng.return_value = make_ng_response(Cmd.LED_CONTROL, 0, b"")
-    result = asyncio.get_event_loop().run_until_complete(hw.led(1, "on"))
+    result = asyncio.get_event_loop().run_until_complete(hw.led("green", on=True))
     transport.send_ng.assert_called_once()
+
+def test_led_pulse():
+    transport = make_mock_transport()
+    hw = HWCommands(transport)
+    transport.send_ng.return_value = make_ng_response(Cmd.LED_CONTROL, 0, b"")
+    result = asyncio.get_event_loop().run_until_complete(
+        hw.led("red", pulse=True, speed=300, count=3))
+    transport.send_ng.assert_called_once()
+    # Verify the payload
+    call_args = transport.send_ng.call_args
+    payload = call_args[0][1]  # second positional arg
+    led_mask, action, brightness, speed, count = struct.unpack("<BBBHH", payload)
+    assert led_mask == 0x04  # red = C
+    assert action == 4       # pulse
+    assert speed == 300
+    assert count == 3
+
+def test_led_brightness():
+    transport = make_mock_transport()
+    hw = HWCommands(transport)
+    transport.send_ng.return_value = make_ng_response(Cmd.LED_CONTROL, 0, b"")
+    result = asyncio.get_event_loop().run_until_complete(hw.led("all", brightness=50))
+    payload = transport.send_ng.call_args[0][1]
+    led_mask, action, bright, _, _ = struct.unpack("<BBBHH", payload)
+    assert led_mask == 0x0F  # all
+    assert action == 3       # pwm
+    assert bright == 50